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A287186 Positions of 1 in A287457; complement of A287519. 3
1, 9, 16, 23, 27, 35, 42, 46, 50, 57, 64, 68, 72, 79, 83, 91, 98, 105, 109, 117, 124, 128, 132, 139, 143, 151, 155, 163, 170, 174, 178, 185, 192, 196, 200, 207, 211, 219, 223, 231, 238, 242, 246, 253, 257, 265, 272, 279, 283, 291, 298, 302, 306, 313, 320 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: a(n)/n -> 1.20..., and if m denotes this number, then -1 < m - a(n)/n) < 1 for n >= 1.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];

w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "000"}]

Table[w[n], {n, 0, 8}]

st = ToCharacterCode[w[23]] - 48   (* A287457 *)

Flatten[Position[st, 0]]  (* A287519 *)

Flatten[Position[st, 1]]  (* A287186 *)

CROSSREFS

Cf. A287457, A287519.

Sequence in context: A068824 A095961 A045911 * A134256 A199859 A046463

Adjacent sequences:  A287183 A287184 A287185 * A287187 A287188 A287189

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 18 2017

STATUS

approved

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Last modified July 18 21:25 EDT 2019. Contains 325144 sequences. (Running on oeis4.)